Most media companies have responded to the rise of mobile with a mix of reluctance and inertia. Much like the shift from print to digital, the shift from PCs to mobile devices is happening too quickly for many publishers to react to.

But not all media outlets have been caught flat-footed. Quartz, the Atlantic-owned business news site, launched in 2012 with a focus on content that’s both easily shared and easily read on mobile devices. And readers have responded to it: 41 percent of Quartz’s visitors last month came from mobile phones and tablets, according to Omniture. That number was closer to 25 percent a year ago, said Quartz editor-in-chief Kevin Delaney.